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Biomedical subjects

M F Zide

Publications and source records attributed to M F Zide.

At least 37 records · Page 2Linked to original sources

Hydroxylapatite blocks and particles as bone graft substitutes in orthognathic and reconstructive surgery.

A three-year clinical evaluation of 98 patients in whom dense hydroxylapatite in particle and block form had been placed in facial contour defects and osteotomy sites, and in cystic and reconstructive defects, alone or with autogenous bone, was conducted. The results indicate that the implants were effective in reducing operating time and potential for infection and relapse, as well as in reducing or eliminating the necessity of a donor site. The clinical response was excellent, and complications with both forms were minor, generally related to lack of initial fixation or failure to use autogenous bone in specific situations.

Bone Transplantation↗

Mandibular condyle fracture and dislocation into the middle cranial fossa.

A case report is presented concerning a patient who sustained a condyle fracture with superior dislocation into the middle cranial fossa. Although relatively rare, other cases of central condylar dislocation have been presented and will be discussed and compared. Diagnosis has been a problem, and treatments have varied greatly for these cases. This is the first case on record, however, in which such a dislocation occurred in conjunction with a fracture of the condylar head. In the present case, the dura was covered with temporalis muscle and the glenoid fossa was covered using the fragments of the fractured condyle as an autogenous free bone graft.

Adult↗

Proplast augmentation for posttraumatic zygomatic deficiency.

Facial deformities following fractures of the zygomatic complex are common. Included in this article are the indications, work-up, and surgical technique for placement of Proplast implant material to correct the deformity of the malunited zygomatic complex. Three cases are presented to illustrate this approach.

Accidents, Traffic↗

Orbital decompression by midfacial advancement. Report of two cases.

Patients with midfacial deficiency and exorbitism may pose a difficult challenge for orbital decompression. This article presents a review of the literature and discusses patient assessment, treatment planning, and surgical approaches to correction. Two cases are reported, demonstrating orbital decompression by midfacial advancement via the classic LeFort III osteotomy and a modified LeFort III osteotomy.

Adult↗

Late treatment of malunited malar fractures.

Malunited malar fractures are considered from the points of view of pathophysiology and anatomy. Clinical and radiographic approaches to assessment are described. Surgical techniques are presented in detail. Four representative cases are reported.

Adult↗

Diagnosis and treatment of lateral pharyngeal space infections.

The lateral pharyngeal space is composed of an anterior and posterior compartment. Infection may involve both compartments; however, each compartment may be involved individually with distinctly different clinical findings. This article reviews infections of the lateral pharyngeal space and their treatment.

Adult↗

Alveolar ridge augmentation using nonresorbable hydroxylapatite with or without autogenous cancellous bone.

A four-year prospective evaluation of the use of nonresorbable, particulate hydroxylapatite (HA) to augment deficient alveolar ridges was performed. The material was used alone and in combination with finely crushed autogenous cancellous bone. Implants were delivered subperiosteally by syringe injection, usually using local anesthesia for Class I to Class III ridges and general anesthesia for Class III and Class IV ridges. The improved ridge height and width were stable. Postoperative resorption with significant loss of ridge height, frequently seen with rib and iliac crest onlayed grafts, was not observed with HA augmentation. Permanent denture construction began as early as three weeks postoperatively and by four to six weeks if HA was combined with autogenous cancellous bone. It was possible to place mandibular staple implants simultaneously or following HA augmentation. Visor osteotomy techniques were improved by use of HA to produce a wider, more convex stable ridge. Although skin, mucosa, or dermal vestibuloplasties were performed as early as three months postoperatively in a small number of patients, there appeared to be a lesser need for vestibuloplasty after HA augmentation than after onlay bone grafting. In addition, prosthodontists performed fewer denture relines after HA augmentation than after onlay bone grafts. The authors believe the most significant factor accounting for these observations is the firm, nonmobile mucosal base resulting from augmentation with HA. The resultant stable, soft tissue base and improved ridge height and contour have contributed to a comfortable, retentive, stable denture for these patients. The prosthetic and surgical procedures are easier to perform and have produced superior, more permanent results than onlay bone grafts and alloplasts. Preliminary studies also point to exciting possibilities for use of HA as a bone substitute/marrow extender in maxillary and mandibular defects, cysts, and clefts and in osteotomies for orthognathic surgery.

Adult↗

Indications for open reduction of mandibular condyle fractures.

Most condylar fractures of the mandible may be treated by closed reduction and appropriate physiotherapy. Some, however, absolutely should be opened and reduced anatomically; with others, good arguments for open reduction may be offered. This article reviews the possible indications for open reduction and presents an approach that conceals the scar.

Adult↗

Modified LeFort II procedure for simultaneous correction of maxillary and nasal deformities.

An approach to correction of nasomaxillary dysplasia is described. Where midfacial hypoplasia is managed by surgical anteropositioning of the affected skeletal parts, this technique permits management of the associated nasal dysmorphia as well. The one-stage correction is performed with the midfacial skeleton entirely degloved, under direct vision. Details are described, and diagnostic and treatment considerations of two patients are given.

Adult↗

Surgical treatment of maxillary benign tumors.

The presurgical evaluation, surgical treatment, and postoperative plan for benign maxillary tumors have been reviewed. Each tumor deserves individual consideration on the basis of its behavior and size. Treatment must also be suited to the particular case. Cases have been reviewed to demonstrate treatment.

Adult↗